Frontend Engineer

Own and ship high-impact experiments and features end-to-end - from hypothesis to production - that directly move activation, conversion, and revenue metrics. You'll design for measurable outcomes, not just output, and iterate quickly based on data.

Work full-stack across the Growth surface: activation flows and onboarding, self-serve and freemium infrastructure, pricing and packaging mechanics, PQL-to-enterprise funnels, viral and sharing loops.

Build and extend the team's experimentation platform. At Synthesia, Engineers are builders of the experimentation system, not just users of it - constructing A/B infrastructure, instrumentation, and metrics pipelines that power how the whole product grows.

Partner closely with product managers and data analysts to prioritize the highest-leverage work, make clear trade-offs between experimentation velocity and long-term scalability, and translate ambiguous business problems into clean technical solutions. You'll operate with a high degree of autonomy and be expected to define what gets built, not just how.

What You 9re Looking For

• Experience in activation, conversion, monetization, or PLG systems - not growth marketing or CMS/content engineering
• Experience building or significantly extending experimentation infrastructure - A/B systems across cached and non-cached pages, metrics pipelines, experiment orchestration - at the builder bar, not just the user bar
• A habit of quantifying your own impact: you default to metrics (conversion %, activation rate, ARR lift, INP/TTI) when describing what you shipped
• Strong product sense and ownership mindset - comfortable owning the problem definition, trade-offs, and technical approach, not just the implementation tickets
• Experience with viral mechanics, sharing loops, or team-expansion features is a strong plus